 <!DOCTYPE html>
 <html>
	 <head>
		 <meta charsey="utf-8"/>
		 <title>浮动</title>
		 <link href="css/boxstyle.css" rel="stylesheet" />
	</head>
	<body>
		<!-- 快速创建类名为box的盒子：标签名.box*个数>tab -->
		<div class="bigbox clearfix">
		<div class="box">box1</div>
		<div class="box" style="height:180px;">box2</div>
		<div class="box" style="height:230px;">box3</div>
		<!-- <div class="clear"></div> -->
		</div>
		<div class="box2">box4</div>
		
	</body>
</html>
